Physics Light Behavior Quiz
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Questions and Answers

What is the term for light being turned back into the first medium when it encounters a second medium?

  • Reflection (correct)
  • Refraction
  • Diffusion
  • Transmission

    • Which characteristic of light indicates that it can travel through space without needing a medium?

  • Light is an electromagnetic wave
  • Light has a dual nature
  • Light reflects from surfaces
  • Light does not require a material medium for propagation (correct)

    • When light travels from air into glass, what happens to its speed?

  • It remains the same as in air
  • It stops completely
  • It decreases considerably (correct)
  • It increases significantly

    • What type of beam of light is formed when the rays are parallel to each other?

    <p>Parallel Beam</p> Signup and view all the answers

    What is the correct definition of a ray of light?

    <p>A path along which light energy travels</p> Signup and view all the answers

    Which of the following is NOT true about the behavior of light at the interface of two media?

    <p>Light can only be refracted</p> Signup and view all the answers

    A collection of a very small number of light rays is referred to as what?

    <p>Pencil of Light</p> Signup and view all the answers

    What type of beam of light occurs when the rays spread out from a point?

    <p>Diverging Beam</p> Signup and view all the answers

    What is the sign of magnification for a virtual image?

    <p>Positive</p> Signup and view all the answers

    In longitudinal magnification, what does the negative sign represent?

    <p>Inversion of the image</p> Signup and view all the answers

    How is the velocity of the image determined for an object moving along the principal axis?

    <p>By the velocity of the object relative to the mirror</p> Signup and view all the answers

    What is the formula represented by Newton's formula in terms of object and image distances?

    <p>$xy = f^2$</p> Signup and view all the answers

    What indicates that a real image has a negative magnification?

    <p>It is inverted</p> Signup and view all the answers

    In the case of longitudinal magnification, what does 'du' represent?

    <p>Size of the object</p> Signup and view all the answers

    What formula can be used to calculate the velocity of an image for an object moving perpendicular to the principal axis?

    <p>$h_2 - v = (h_1)(u)$</p> Signup and view all the answers

    What happens to the image magnitude when the object is doubled in size along the principal axis?

    <p>Image size becomes larger</p> Signup and view all the answers

    What are marginal rays?

    <p>Rays that travel parallel and far from the principal axis</p> Signup and view all the answers

    What does spherical aberration refer to?

    <p>Inability of a spherical mirror to focus all rays to the same point</p> Signup and view all the answers

    If two plane mirrors are inclined at 60 degrees, how many images are formed when an object is placed between them?

    <p>5</p> Signup and view all the answers

    How can one distinguish between a concave mirror and a convex mirror without touching them?

    <p>By bringing the face close to each mirror and observing the image</p> Signup and view all the answers

    If the sun subtends an angle θ radians at the pole of a concave mirror, how is the diameter of the sun's image calculated?

    <p>Using the formula x = f tan θ</p> Signup and view all the answers

    What type of image does a concave mirror produce for a distant object like the sun?

    <p>Real, inverted, and diminished</p> Signup and view all the answers

    What is the relationship between the height of an object and the height of its image in a concave mirror when the object is placed perpendicular to the principal axis?

    <p>The height of the image can be larger or smaller depending on the focal length</p> Signup and view all the answers

    Why can spherical aberration be eliminated by using a paraboloid mirror?

    <p>It focuses all rays to a single point regardless of their angle</p> Signup and view all the answers

    How does the density of a medium affect the speed of light?

    <p>The speed of light decreases with higher density.</p> Signup and view all the answers

    What happens to light when it passes from a denser medium to a rarer medium beyond the critical angle?

    <p>It undergoes total internal reflection.</p> Signup and view all the answers

    Which color of light has the highest refractive index in a medium?

    <p>Violet</p> Signup and view all the answers

    What is the result of multiplying the refractive indices of three different media?

    <p>It equals 1.</p> Signup and view all the answers

    What is defined as the critical angle in optics?

    <p>The angle at which refracted light travels along the interface.</p> Signup and view all the answers

    In the formula $a \mu w \times w \mu g \times g \mu a = 1$, which term represents the refractive index from medium A to medium W?

    <p>aµw</p> Signup and view all the answers

    What is the effect of a higher refractive index on the behavior of light?

    <p>It causes a greater bending of light.</p> Signup and view all the answers

    If two media have refractive indices related as $\frac{1}{\mu_3} = \frac{1}{\mu_2}$, what does this imply?

    <p>Media 2 and 3 have equal refractive indices.</p> Signup and view all the answers

    What device is used to convert electrical signals into light for transmission through optical fibres?

    <p>Transducer</p> Signup and view all the answers

    When light travels through glass with a refractive index of 1.5, what is the speed of light in that medium?

    <p>$2 imes 10^8$ m/s</p> Signup and view all the answers

    If the frequency of light waves is $6 imes 10^{14}$ Hz, what is the wavelength of light in air?

    <p>$5 imes 10^{-7}$ m</p> Signup and view all the answers

    What effect does the refractive index have on the path of light when passing from air to glass?

    <p>Light slows down</p> Signup and view all the answers

    What is the relationship used to calculate the speed of light in a medium with a given refractive index?

    <p>$v = c / ext{R.I.}$</p> Signup and view all the answers

    How much does a bottom of a water tank appear to be raised if the actual depth is 4 m and the refractive index of water is $3/4$?

    <p>2.67 m</p> Signup and view all the answers

    What phenomenon enables optical fibres to transmit light over long distances?

    <p>Reflection</p> Signup and view all the answers

    Which of the following is NOT a correct effect of light passing from air into a denser medium like glass?

    <p>Increase in frequency</p> Signup and view all the answers

    What is the power of a concave lens?

    <p>Negative</p> Signup and view all the answers

    Which of the following correctly describes the position of the image formed by a concave lens when the object is between the lens and its focal point?

    <p>Virtual and erect</p> Signup and view all the answers

    What is the formula to calculate the power of a lens?

    <p>Power (P) = 1/f (in m)</p> Signup and view all the answers

    How does the power of a lens combine when two thin lenses are placed in contact?

    <p>Power is the algebraic sum of the powers of the lenses</p> Signup and view all the answers

    When the object is positioned at infinity relative to a lens, the nature of the image formed is:

    <p>Virtual and erect</p> Signup and view all the answers

    What is the relationship represented by the lens formula 1/f = 1/v + 1/u?

    <p>It defines the relationship between object distance, image distance, and power</p> Signup and view all the answers

    Which of the following best describes the size of the image formed when the object is at infinity?

    <p>Highly diminished</p> Signup and view all the answers

    If the focal length of a lens is -0.5m, what is its power?

    <p>-2 D</p> Signup and view all the answers

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    Description

    Test your knowledge on the behavior of light as it interacts with different media. This quiz covers topics such as reflection, refraction, magnification, and the characteristics of light beams. Enhance your understanding of light's properties and principles in physics.

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